Show decorations in the editor tabs (eclipse-theia#13301)

packages/core/src/browser/shell/tab-bar-decorator.ts

@@ -17,9 +17,12 @@
 import debounce = require('lodash.debounce');
 import { Title, Widget } from '@phosphor/widgets';
 import { inject, injectable, named } from 'inversify';
-import { Event, Emitter, ContributionProvider } from '../../common';
-import { WidgetDecoration } from '../widget-decoration';
+import { ContributionProvider, Emitter, Event } from '../../common';
+import { ColorRegistry } from '../color-registry';
+import { Decoration, DecorationsService, DecorationsServiceImpl } from '../decorations-service';
 import { FrontendApplicationContribution } from '../frontend-application-contribution';
+import { Navigatable } from '../navigatable-types';
+import { WidgetDecoration } from '../widget-decoration';
 
 export const TabBarDecorator = Symbol('TabBarDecorator');
 
@@ -53,6 +56,12 @@ export class TabBarDecoratorService implements FrontendApplicationContribution {
     @inject(ContributionProvider) @named(TabBarDecorator)
     protected readonly contributions: ContributionProvider<TabBarDecorator>;
 
+    @inject(DecorationsService)
+    protected readonly decorationsService: DecorationsServiceImpl;
+
+    @inject(ColorRegistry)
+    protected readonly colors: ColorRegistry;
+
     initialize(): void {
         this.contributions.getContributions().map(decorator => decorator.onDidChangeDecorations(this.fireDidChangeDecorations));
     }
@@ -71,6 +80,27 @@ export class TabBarDecoratorService implements FrontendApplicationContribution {
             const decorations = decorator.decorate(title);
             all = all.concat(decorations);
         }
+        if (Navigatable.is(title.owner)) {
+            if (title.owner.getResourceUri() !== undefined) {
+                const serviceDecorations = this.decorationsService.getDecoration(title.owner.getResourceUri()!, false);
+                all = all.concat(serviceDecorations.map(d => this.toDecorator(d)));
+            }
+        }
         return all;
     }
+
+    protected toDecorator(decoration: Decoration): WidgetDecoration.Data {
+        const colorVariable = decoration.colorId && this.colors.toCssVariableName(decoration.colorId);
+        return {
+            tailDecorations: [
+                {
+                    data: decoration.letter ? decoration.letter : '',
+                    fontData: {
+                        color: colorVariable && `var(${colorVariable})`
+                    },
+                    tooltip: decoration.tooltip ? decoration.tooltip : ''
+                }
+            ]
+        };
+    }
 }

packages/core/src/browser/shell/tab-bars.ts

@@ -170,8 +170,8 @@ export class TabBarRenderer extends TabBar.Renderer {
         const hover = this.tabBar && (this.tabBar.orientation === 'horizontal' && this.corePreferences?.['window.tabbar.enhancedPreview'] === 'classic')
             ? { title: title.caption }
             : {
-            onmouseenter: this.handleMouseEnterEvent
-        };
+                onmouseenter: this.handleMouseEnterEvent
+            };
 
         return h.li(
             {
@@ -188,6 +188,7 @@ export class TabBarRenderer extends TabBar.Renderer {
                 { className: 'theia-tab-icon-label' },
                 this.renderIcon(data, isInSidePanel),
                 this.renderLabel(data, isInSidePanel),
+                this.renderTailDecorations(data, isInSidePanel),
                 this.renderBadge(data, isInSidePanel),
                 this.renderLock(data, isInSidePanel)
             ),
@@ -289,6 +290,35 @@ export class TabBarRenderer extends TabBar.Renderer {
         return h.div({ className: 'p-TabBar-tabLabel', style }, data.title.label);
     }
 
+    protected renderTailDecorations(renderData: SideBarRenderData, isInSidePanel?: boolean): VirtualElement[] {
+        const tailDecorations = this.getDecorationData(renderData.title, 'tailDecorations')
+            .filter(acc => acc !== undefined).reduce((acc, current) => acc!.concat(current!), []);
+        if (tailDecorations === undefined || tailDecorations.length === 0) {
+            return [];
+        }
+        let dotDecoration: WidgetDecoration.TailDecoration.AnyPartial | undefined;
+        const otherDecorations: WidgetDecoration.TailDecoration.AnyPartial[] = [];
+        tailDecorations.reverse().forEach(decoration => {
+            const partial = decoration as WidgetDecoration.TailDecoration.AnyPartial;
+            if (WidgetDecoration.TailDecoration.isDotDecoration(partial)) {
+                dotDecoration ||= partial;
+            } else if (partial.data || partial.icon || partial.iconClass) {
+                otherDecorations.push(partial);
+            }
+        });
+        const decorationsToRender = dotDecoration ? [dotDecoration, ...otherDecorations] : otherDecorations;
+        return decorationsToRender.map((decoration, index) => {
+            const { tooltip, data, fontData, color, icon, iconClass } = decoration;
+            const iconToRender = icon ?? iconClass;
+            const className = ['p-TabBar-tail', 'flex'].join(' ');
+            const style = fontData ? fontData : color ? { color } : undefined;
+            const content = (data ? data : iconToRender
+                ? h.span({ className: this.getIconClass(iconToRender, iconToRender === 'circle' ? [WidgetDecoration.Styles.DECORATOR_SIZE_CLASS] : []) })
+                : '') + (index !== decorationsToRender.length - 1 ? ',' : '');
+            return h.span({ key: ('tailDecoration_' + index), className, style, title: tooltip ?? content }, content);
+        });
+    }
+
     renderBadge(data: SideBarRenderData, isInSidePanel?: boolean): VirtualElement {
         const totalBadge = this.getDecorationData(data.title, 'badge').reduce((sum, badge) => sum! + badge!, 0);
         if (!totalBadge) {

packages/core/src/browser/style/tabs.css

@@ -123,6 +123,12 @@
   white-space: nowrap;
 }
 
+.p-TabBar-tail {
+  padding-left: 5px;
+  text-align: center;
+  justify-content: center;
+}
+
 .p-TabBar.theia-app-centers .p-TabBar-tabLabelWrapper {
   display: flex;
 }